MySQL case-sensitive processing method

MySQL case-sensitive processing methods and code examples

MySQL is a commonly used relational database management system, which needs to be used when dealing with case-sensitive issues pay attention. In MySQL, it is case-insensitive by default, that is, it is not case-sensitive. But sometimes we need to perform case-sensitive processing, which can be achieved through the following methods.

1. Specify the default character set as Bin (binary) type when creating databases and tables, so that the database will be case-sensitive. The specific operations are as follows:

   CREATE DATABASE mydatabase CHARACTER SET utf8 COLLATE utf8_bin;

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   The database created in this way will be case-sensitive.

2. Specify the character type of the column as Binary when creating the table, so that the column will be case-sensitive. The specific operations are as follows:

   CREATE TABLE mytable (
    name BINARY
   );

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   The name column in the table created in this way will be case-sensitive.

3. Use the BINARY keyword to query case-sensitive results. The specific operations are as follows:

   SELECT * FROM mytable WHERE BINARY name = 'John';

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   The results of this query will be case-sensitive.

In addition to the above methods, you can also modify the case-sensitive parameter settings by modifying the MySQL configuration file my.cnf. Add the following configuration in the [mysqld] section:

lower_case_table_names = 0

Set the parameter to 0 to indicate case sensitivity, and to 1 to indicate case insensitivity.

To summarize, to deal with case sensitivity issues in MySQL, you can set the character set of the database and table to Bin type, the column type to Binary, or use the BINARY keyword when querying. In addition, you can also set case-sensitive parameters by modifying the configuration file. These methods can be implemented according to specific needs. Hopefully these code examples and methods can help you solve MySQL case-sensitive handling issues.

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